[Warning]
 Before firmware upgrade :
(1) Make sure of your AK100’s battery level at least over 50%.
(2) Make sure of your  AK100’s memory size at least over 50 MB.
(3) Don''''t remove the connection between PC & AK100 during transferring hex data.

[Improvements]

1.     Support AIFF , ALAC , AAC codec (Updated tutorial contents about APPLE codec)
2.     Moving out to upper list menu by long pressing back touch button (←) after approaching to “setting” menu